/*
* pci_pre_init
*
* This routine is called just prior to registering the hose and gives
* the board the opportunity to check things. Returning a value of zero
* indicates that things are bad & PCI initialization should be aborted.
*
* Different boards may wish to customize the pci controller structure
* (add regions, override default access routines, etc) or perform
* certain pre-initialization actions.
*
*/
int pci_pre_init(struct pci_controller *hose)
{
unsigned long addr;
if (!board_with_pci()) { return 0; }
/*
* Set priority for all PLB3 devices to 0.
* Set PLB3 arbiter to fair mode.
*/
mfsdr(SD0_AMP1, addr);
mtsdr(SD0_AMP1, (addr & 0x000000FF) | 0x0000FF00);
addr = mfdcr(PLB3_ACR);
mtdcr(PLB3_ACR, addr | 0x80000000); /* Sequoia */
/*
* Set priority for all PLB4 devices to 0.
*/
mfsdr(SD0_AMP0, addr);
mtsdr(SD0_AMP0, (addr & 0x000000FF) | 0x0000FF00);
addr = mfdcr(PLB4_ACR) | 0xa0000000; /* Was 0x8---- */
mtdcr(PLB4_ACR, addr); /* Sequoia */
/*
* As of errata version 0.4, CHIP_8: Incorrect Write to DDR SDRAM.
* Workaround: Disable write pipelining to DDR SDRAM by setting
* PLB0_ACR[WRP] = 0.
*/
mtdcr(PLB0_ACR, 0); /* PATCH HAB: WRITE PIPELINING OFF */
/* Segment1 */
mtdcr(PLB1_ACR, 0); /* PATCH HAB: WRITE PIPELINING OFF */
return board_with_pci();
}
/*
* Override weak default pci_master_init()
*/
void pci_master_init(struct pci_controller *hose)
{
if (!board_with_pci())
return;
__pci_master_init(hose);
}
/*
* pci_target_init
*
* The bootstrap configuration provides default settings for the pci
* inbound map (PIM). But the bootstrap config choices are limited and
* may not be sufficient for a given board.
*
*/
void pci_target_init(struct pci_controller *hose)
{
if (!board_with_pci()) { return; }
/*
* Set up Direct MMIO registers
*
* PowerPC440EPX PCI Master configuration.
* Map one 1Gig range of PLB/processor addresses to PCI memory space.
* PLB address 0xA0000000-0xDFFFFFFF ==> PCI address
* 0xA0000000-0xDFFFFFFF
* Use byte reversed out routines to handle endianess.
* Make this region non-prefetchable.
*/
/* PMM0 Mask/Attribute - disabled b4 setting */
out32r(PCIX0_PMM0MA, 0x00000000);
out32r(PCIX0_PMM0LA, CFG_PCI_MEMBASE); /* PMM0 Local Address */
/* PMM0 PCI Low Address */
out32r(PCIX0_PMM0PCILA, CFG_PCI_MEMBASE);
out32r(PCIX0_PMM0PCIHA, 0x00000000); /* PMM0 PCI High Address */
/* 512M + No prefetching, and enable region */
out32r(PCIX0_PMM0MA, 0xE0000001);
/* PMM0 Mask/Attribute - disabled b4 setting */
out32r(PCIX0_PMM1MA, 0x00000000);
out32r(PCIX0_PMM1LA, CFG_PCI_MEMBASE2); /* PMM0 Local Address */
/* PMM0 PCI Low Address */
out32r(PCIX0_PMM1PCILA, CFG_PCI_MEMBASE2);
out32r(PCIX0_PMM1PCIHA, 0x00000000); /* PMM0 PCI High Address */
/* 512M + No prefetching, and enable region */
out32r(PCIX0_PMM1MA, 0xE0000001);
out32r(PCIX0_PTM1MS, 0x00000001); /* Memory Size/Attribute */
out32r(PCIX0_PTM1LA, 0); /* Local Addr. Reg */
out32r(PCIX0_PTM2MS, 0); /* Memory Size/Attribute */
out32r(PCIX0_PTM2LA, 0); /* Local Addr. Reg */
/*
* Set up Configuration registers
*/
/* Program the board's subsystem id/vendor id */
pci_write_config_word(0, PCI_SUBSYSTEM_VENDOR_ID,
CFG_PCI_SUBSYS_VENDORID);
pci_write_config_word(0, PCI_SUBSYSTEM_ID, CFG_PCI_SUBSYS_ID);
/* Configure command register as bus master */
pci_write_config_word(0, PCI_COMMAND, PCI_COMMAND_MASTER);
/* 240nS PCI clock */
pci_write_config_word(0, PCI_LATENCY_TIMER, 1);
/* No error reporting */
pci_write_config_word(0, PCI_ERREN, 0);
pci_write_config_dword(0, PCI_BRDGOPT2, 0x00000101);
}
/*
* pci_master_init
*
*/
void pci_master_init(struct pci_controller *hose)
{
unsigned short temp_short;
if (!board_with_pci()) { return; }
/*---------------------------------------------------------------
* Write the PowerPC440 EP PCI Configuration regs.
* Enable PowerPC440 EP to be a master on the PCI bus (PMM).
* Enable PowerPC440 EP to act as a PCI memory target (PTM).
*--------------------------------------------------------------*/
pci_read_config_word(0, PCI_COMMAND, &temp_short);
pci_write_config_word(0, PCI_COMMAND,
temp_short | PCI_COMMAND_MASTER |
PCI_COMMAND_MEMORY);
}
